Erwin

“Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.”
― Dale Carnegie

“Nothing in this world can take the place of persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent. The slogan 'Press On!' has solved and always will solve the problems of the human race.”
― Calvin Coolidge

“It is a wise thing to be polite; consequently, it is a stupid thing to be rude. To make enemies by unnecessary and willful incivility, is just as insane a proceeding as to set your house on fire. For politeness is like a counter--an avowedly false coin, with which it is foolish to be stingy.”
― Arthur Schopenhauer, The Wisdom of Life and Counsels and Maxims

“There are in fact two things, science and opinion; the former begets knowledge, the latter ignorance.”
― Hippocrates